Today’s FOSS OTD is oriented towards programmers who need a good way to test regular expressions. Check out The Regex Coach - interactive regular expressions. It updates in real time, as you edit a regex or its target text. Very, very cool. Not actually open source, but still very cool.

Okay, so I got behind on the FOSS OTD postings. Catching up:

10/19: PHP is a wonderful, fast, and flexible OSS scripting language for web programming and stand-alone applications.
10/20: FileZilla is a free FTP client. There is also a great FileZilla Server application.
10/21: PuTTY is a free telnet/SSH client. Very dependable and flexible.
10/22: Notepad++ is a [...]